NONLINEAR CHARGE RELEASE FROM HIGHLY STRESSED PIEZOELECTRIC ELEMENTS
In many previous experiments, it has been found that the amount of charge obtuined from a piezoelectric element had depended on rate and length of stress application and terminating electrical impedance. In searching for an explanation for these phenomena, apparatus was set up to measure the capacitance as a function of voltage stress. When the data were tabulated and analyzed, it was apparent that the capacitance change could not possibly account for the excess free charge released as the resultant electrical stress was allowed to decrease while the ceramic element was stressed by a constant mechanical load. Further measurements and analysis gave indications thnt an explanation for the data obtained could be that the strain resulting from the electrical stress is not linear, but rather a complicated function of the electrical and mechnnical stresses. (auth)
- Research Organization:
- Sandia Corp., Albuquerque, N. Mex.
- DOE Contract Number:
- AT(29-1)-789
- NSA Number:
- NSA-12-005440
- OSTI ID:
- 4333902
- Report Number(s):
- SCTM-312-57(14)
- Country of Publication:
- United States
- Language:
- English
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